Kelsay J L, Behall K M, Prather E S
Am J Clin Nutr. 1978 Jul;31(7):1149-53. doi: 10.1093/ajcn/31.7.1149.
Twelve men 37 to 58 years of age consumed two diets for a period of 26 days each in a cross-over design. The high fiber diet contained fruits and vegetables and the lower fiber diet contained fruit and vegetable juices. Neither diet contained whole grain cereals or nuts. Some nutrients were added to the low fiber diet in order to make the diets equivalent insofar as possible in all respects except fiber. The inclusion of fruits and vegetables in the diet decreased bowel transit time, increased fecal weight, increased number of defecations, increased fecal excretions and decreased apparent digestibilities of energy, nitrogen, and fat. Six of the 12 subjects had diastolic blood pressure of 80 or more when consuming the low fiber diet. The diastolic blood pressures of these six men were significantly lower when the high fiber diet was consumed.
12名年龄在37至58岁之间的男性采用交叉设计，每种饮食各食用26天。高纤维饮食包含水果和蔬菜，低纤维饮食包含果汁和蔬菜汁。两种饮食均不含全谷物或坚果。为使两种饮食除纤维外的所有方面尽可能等同，在低纤维饮食中添加了一些营养素。饮食中包含水果和蔬菜可缩短肠道转运时间、增加粪便重量、增加排便次数、增加粪便排泄物，并降低能量、氮和脂肪的表观消化率。12名受试者中有6人在食用低纤维饮食时舒张压达到或超过80。食用高纤维饮食时，这6名男性的舒张压显著降低。
